JPS5822615B2 - excavator - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a type of excavation in which an arm on which a packet of excavation sump is mounted at one end is mounted on a boom, and the packet is horizontally pushed out by the boom and arm to excavate earth and sand. It's about machines.

Conventionally, this type of excavator has an arm 1 as shown in Figure 1.
Usually, the packet 3 is swingably mounted on the tip of the boom 2, and the packet 3 is swingably mounted on the tip of the arm 1.

In the excavation and loading operation, the packet 3 is pulled toward the rotating excavator main body 4 on the traveling trolley T as indicated by the symbol A, and the packet 3 is pushed horizontally from this position to the position indicated by the symbol B. At position B, the packet 3 is raised as shown by symbol C, and earth and sand are scooped into the packet 3.

In this state, the boom 2 is extended to lift the packet 3 to the position indicated by the symbol, and the packet 3 is brought down at this position, thereby releasing the earth and sand in the packet 3 onto the truck bed.

And these operations are packet 3, arm 1, boom 2
are controlled by respective hydraulic cylinders 5, 6.7 connected to.

However, in the series of excavation and loading operations described above, the horizontal pushing operation of the packet 3 performed when scooping earth and sand into the packet 3 and when unloading the earth and sand scooped into the packet 3 onto the truck bed is as follows. It is controlled by simultaneously operating the boom 2, arm 1, and packet 3 by appropriate amounts.

For this reason, the operator operating this type of excavator must operate multiple hydraulic cylinders 5 to 7 at the same time when applying the above-mentioned horizontal extrusion motion to the packet 3.
Skill is required.

Even for an experienced operator, the above-mentioned horizontal extrusion operation of the packet 3 has the disadvantage of being extremely tiring.

The present invention aims to realize an excavator that can eliminate the drawbacks of the conventional horizontal extrusion type excavator mentioned above and improve operation and excavation efficiency. A revolving body, a boom whose base is attached to the front part of the revolving body so as to be able to be raised and raised freely by a boom hydraulic cylinder, an arm whose base is pivotally attached to the tip of the boom and which is swung by an arm hydraulic cylinder; In an excavator equipped with a packet attached to the tip of the arm so as to be rotated and pushed forward by a packet hydraulic cylinder connected via a pair of rigid links, The other end of the boom hydraulic cylinder whose one end is pivotally connected, the other end of the link whose one end is pivotally connected to the boom, the other end of the link whose one end is pivotally connected to arm-L, and a pair of rigid links. This invention relates to an excavator characterized in that an arm and the other end of a packet hydraulic cylinder connected to a packet are pivotably connected at one point.

FIG. 2 shows an embodiment of an excavator according to the present invention, in which a bracket 9 is used to pivotally attach a boom 11 to an excavator main body 8 which is rotatably mounted on a traveling trolley T. A bracket 10 for pivotally mounting a hydraulic cylinder 12 for raising and lowering the boom is fixed.

These brackets) 9.10 each have boom 11,
One end of the boom elevation hydraulic cylinder 12 or pin 13.14
It is pivoted by.

An arm 15 is pivotally attached to the tip of the boom 11 by a pin 16, and a packet 17 is pivotally attached to the tip of the arm 15 by a pin 18.

one end of the boom elevation hydraulic cylinder 12; the other end of the link 20, one end of which is pivotally connected to the boom 11 by a pin 19; and the other end of the link 23, one end of which is pivotally connected to the arm 15 by a pin 22; It is pivotally connected to one end of a packet hydraulic cylinder 24 at one point by a pin 21.

Still the other end of the packet cylinder 24 is connected to the other end of a link 26 which is pivotally connected at one end by a pin 25 on the arm 15;
One end of the link 28 is pivotally connected to the packet 11 by a pin 27, and the other end of the link 28 is pivotally connected to the packet 11 by a pin 29 at one point.

Further, an arm hydraulic cylinder 32 is provided, one end of which is pivotally connected to the boom 11 by a pin 30, and the other end of which is pivotally connected to the arm 15F by a pin 31.

The device according to the present invention has the above-mentioned configuration, and its operation will be explained next. When pushing out the packet 1T horizontally, when the arm hydraulic cylinder 32 is extended, the arm 15 is moved against the boom 11. and relatively rotate around the pin 16.

At this time, the links 20, 23 are both displaced and the pin 14
Shorten the distance between and 19 and between 22 and 29.

As the distance between pins 14 and 19 decreases, the angle of elevation of boom 11 decreases, causing packet 17 to be moved to a lower position than simply being rotated around pin 16; Link 2 to shorten the distance between 29
6. Rotate packet 1γ around pin 18 via 28.

That is, the length of links 20, 23, 26, 28, pin 1
By appropriately selecting positions such as 922.25.27, etc., the tip of the arm 15 can be moved horizontally by simply extending the arm cylinder 32, and
A mechanism can be provided to keep the attitude of the bucket N7, which is pivotally attached to the tip of the arm 15, constant during movement.

As a result, by extending the arm hydraulic cylinder 32 from the state shown in FIG. 2E, the packet 17 is pushed out horizontally in front of the excavator main body 8 as shown in FIG. 3F.

Then, by raising the packet 17 as indicated by the symbol F using the packet cylinder 24, earth and sand can be scooped into the packet 17.

Further, when the packet 11 is to be drawn toward the main body 8 side, the arm cylinder 32 may be retracted in the opposite manner to the above.

The earth and sand are excavated by the horizontal extrusion movement of the packet 17 obtained by operating the arm cylinder 32 mentioned above, or the bucket N into which the earth and sand is scooped as shown in FIG.
By horizontally moving the packet 7 from the G position to the H position, the packet 17 can be moved to the unloading position onto the truck bed.

As described in detail above, the present invention is configured so that the packet can be pushed out horizontally only by operating the arm cylinder, so compared to conventional systems, the driving operation is significantly easier and operator fatigue is reduced. This has the practical effect of not only being able to improve the work efficiency, but also improving work efficiency, and eliminating the drawbacks of the above-mentioned conventional methods.

[Brief explanation of the drawing]

Figure 1 is a schematic explanatory diagram of a conventional excavator, Figures 2 and 3
The figures are schematic explanatory views of one embodiment of the present invention, FIG. 2 is a side view, and FIG. 3 is an explanatory view of the operating mode. In FIGS. 2 and 3, 8...excavator main body,
9.10... Bracket, 11... Boom, 12... Hydraulic cylinder for boom elevation, 1
5...Arm, 17...Packet, 2
4... Hydraulic cylinder for packet, 32...
...Hydraulic cylinder for arm.

Claims (1)

[Claims] 1. A revolving body that is rotatably mounted on a traveling truck, a boom whose base is mounted on the front of the revolving body so that it can be raised and raised by a boom hydraulic cylinder, and whose base is pivoted to the tip of the boom, An arm that is swung by an arm hydraulic cylinder, and a packet attached to the tip of the arm so as to be rotated and pushed forward by a packet hydraulic cylinder connected via a pair of rigid links. In the excavator, the other end of the boom hydraulic cylinder has one end pivoted on the front part of the revolving body, the other end of the link with one end pivoted on the boom, and the other end of the link with one end pivoted on the arm. An excavator characterized in that one end of a hydraulic cylinder for a packet is connected to an arm and a packet via a pair of rigid links, and the other end of a hydraulic cylinder for a packet is pivotably connected at one point.